English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Current-voltage (IV) characteristics and the temperature dependence of thecontact resistance [$R(T)$] of Au / YBa$_2$Cu$_3$O$_{7-\delta}$ (optimallydoped YBCO) interfaces have been studied at different resistance states. Thisstates were produced by resistive switching after accumulating cyclicelectrical pulses of increasing number and voltage amplitude. The IVcharacteristics and the $R(T)$ dependence of the different states areconsistent with a Poole-Frenkel (P-F) emission mechanism with trapping-energylevels $E_t$ in the 0.06-0.11 eV range. $E_t$ remains constant up to anumber-of-pulses-dependent critical voltage and increases linearly with furtherincreasing the voltage amplitude of the pulses. The observation of a P-Fmechanism reveals the existence of an oxygen-depleted layer of YBCO near theinterface. A simple electrical transport scenario is discussed, where thedegree of disorder, the trap energy level and the temperature range determinean electrical conduction dominated by non-linear effects, or by a P-F emissionor by a Variable-Range Hopping regime.

Poole-Frenkel effect and Variable-Range Hopping conduction in metal / YBCO resistive switching devices